Related Clues:
- A gas from the past
- Old Standard Oil brand
- Humble Oil brand
- 'Happy Motoring' sloganeer
- Italian pronoun
- Oil name from long ago
- Gas of the past
- Sinclair alternative
- Sinclair contemporary
- Company that merged with BP in 1998
- BP acquisition of 1998
- Exxon rival
- 'Happy Motoring' company
- Station name
- Flying A competitor